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Finding the Fourth Proportional to 8,691.80, 13,005.30 and 5,775.80

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Solution

The fourth proportional to 8,691.80, 13,005.30 and 5,775.80 is: 8,642.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.80 : 13,005.30 = 5,775.80 : x
  2. Step 2: Convert to fraction form
    8,691.80/13,005.30 = 5,775.80/x
  3. Step 3: Cross multiply
    8,691.80x = 13,005.30 × 5,775.80
  4. Step 4: Simplify right side
    8,691.80x = 75,116,011.74
  5. Step 5: Solve for x
    x = 75,116,011.74/8,691.80
  6. Step 6: Final answer
    x = 8,642.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.